/Engine/Plugins/Experimental/StructUtils/Source/StructUtils/Public/PropertyBag.h
Adds properties to the bag. If property of same name already exists, it will be replaced with the new type. Numeric property values will be converted if possible, when a property's type changes.
void AddProperties ( const TConstArrayView< [FPropertyBagPropertyDesc](API\Plugins\StructUtils\FPropertyBagPropertyDesc) > Descs )